Here is the full list of all 55 Yakuza Kiwami achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Obtain all other achievements.
Completed 100% of the Completion List.
Obtained EX Rank on Haruka's Requests.
Walked 1km during Premium Adventure while holding Haruka's hand.
Completed the game in Legend Mode.
Completed all of the Climax Battles.
Completed the final chapter.
Completed all substories.
Defeated Amon.
Upgraded all Majima Everywhere abilities.
Met the mysterious lady, Goromi.
Completed "Wife of a Yakuza."
The Mad Dog of Shimano forced his way into a fight.
Completed "The Fake Mizuki's Truth."
Assaulted by Majima from above.
Completed chapter 12.
Completed chapter 11.
Won all tournaments in the underground coliseum.
Completed "Bet On A Champ."
Completed "Man On a Ledge."
Obtained all Soul, Technique, and Body abilities.
Completed all training for Komaki Style.
Completed chapter 10.
Completed chapter 9.
Completed chapter 8.
Thug Majima forced his way into a fight.
Reached Rank B in Majima Everywhere.
Completed chapter 7.
Played all minigames.
Completed "A Doctor's Duty."
Completed chapter 6.
Completed "My Baby's a Showgirl."
Spent a steamy moment with Yui.
Won against all rivals in MesuKing.
Completed chapter 5.
Completed chapter 4.
Spent a steamy moment with Rina.
Enjoyed mahjong with a hostess.
Successfully asked a hostess out on a date.
Won all Pocket Circuit races.
Completed 30 substories.
Completed 50% of the Completion List.
Assaulted by Majima from a manhole.
Breaker Majima forced his way into a fight.
Met Zombie Majima.
Slugger Majima forced his way into a fight.
Completed 10 substories.
Completed "The Price of an F-Cup."
Obtained at least 10 Soul, Technique, and Body abilities.
Met Officer Majima.
Completed chapter 3.
Completed chapter 2.
Got chased by Majima.
Completed chapter 1.
Collected the money owed.